Temporal evolution and perturbation coherent structures
Lagrangian coherent structures
... In this work, a review of the Lagrangian Coherent Structures in non-linear Dynamical Systems has been done. The first objective of this thesis was to understand this new topic which is being used in ...
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Generalized Lagrangian coherent structures
... include evolution of tracers in fluid flows with or without diffusion, evolution of the boundaries between two im- miscible fluids, modified velocities in a range of contexts (effective velocities for ...
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Predicting globally-coherent temporal structures from texts via endpoint inference and graph decomposition
... most structures predicted this way are incoherent, therefore useless for downstream applica- ...a temporal graph under coherence constraints as a global optimization problem that can solved exactly with in- ...
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A Framework for Discovering Temporal Coherent Rules
... The calendar-based pattern [10] has already been proposed by researchers to restrict the time-based association- ships. It proposes a novel algorithm to discover association rule on time dependent data utilizing ...
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Nonlinear coherent structures in granular crystals
... Without additional sources to add energy to a granular crystal, one would not expect a genuine traveling solitary wave to exist in either a square or hexagonal lattice because the energy imparted to a particle upon ...
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Tracking of coherent thermal structures on a heated wall.
... of coherent thermal structures on a heated ...The temporal evolution of a thermal pattern observed on a heated wall by infrared camera is correlated with the propagation velocity of the ...
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Robust tori-like Lagrangian coherent structures
... dx . (4) The condition to obtain a RT-like LCS occurs when the perturbation, and at least one of the equations of motion, vanish forming straight lines in phase space. These lines behave as dynamical barriers for ...
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Coherent structures in the breakdown bubble of a vortex flow
... Helical structures downstream of the breakdown-bubble of the Grabowski vortex profile at Reynolds numbers Re ≤ 500 have been extensively studied through stability analysis in the ...low-frequency coherent ...
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Remote sensing observations of the coherent and non-coherent ring structures in the vicinity of Lesser Antilles
... Thus, we can see that there is some kind of discrepancy between the results of the analysis of the previously cited altimetry data, numerical results and Lagrangean observa- tions studying NBC ring structure and the ...
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Boundary Perturbation Theory for Scattering in Layered Rough Structures
... Layered structures with rough interfaces have been also treated resorting to radiative transfer theory ...However, coherent effects are not accounted for in RT theory and could not be contemplated without ...
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Tomographic PIV measurement of coherent dissipation scale structures
... of Coherent Structures and their Identification As previously mentioned, intermittency is thought to be responsible for the ob- served departures from the universality of Kolmogorov’s small scale ...the ...
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How analysts think: sense-making strategies in the analysis of temporal evolution and criminal network structures and activities
... For intelligence analysis, it is essential to piece together a concise picture of how these networks operate, how they are controlled, who controls them, and how information is communicated to plan, coordinate, execute ...
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Dynamics and statistical features of coherent plasma structures in the SOL of a tokamak
... x n x n+1 Figure 1.2: Logistic map of the system (1.86). it demonstrates the onset of chaos from deterministic equations with a nonlinear term. The limit τ = 1 (corresponding to τ = 4 in the rescaled version) corresponds ...
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Continuation of localised coherent structures in nonlocal neural field equations
... Fig. 5.2. Symmetry breaking of weakly unstable solution on a square lattice at µ = 3.2. (a): Evolution of L2 norm. (b): Initial condition given by Eq. (A.3). (c): Weakly unstable solution. (d): Stable solution. ...
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Spatio-temporal Evolution as Bigraph Dynamics
... such as one moving to encircle another, or two regions moving further apart to allow a third to pass between them. The most basic scenarios of single regions splitting and merging have been rigorously analysed in [9, ...
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Modelling the temporal evolution of innovation statistics
... There are three possible explanations for the discrepancy: 1. The projection of the background-error covariance matrix onto the growing modes of the model is too small, or the projection on decaying modes is too large. ...
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Lagrangian coherent structures
... Lagrangian methods, however, can deal with such behaviour, looking at the finite-time Lyapunov exponent (FTLE) of each point in the field as a behavioural guide. T[r] ...
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Lagrangian Coherent Structures: A Climatological Look
... are interacting with space and time and contain information about how the system is func- tioning. However, in fluid dynamics, there are two ways of looking at fluids and that is to use either Eulerian or Lagrangian ...
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Lagrangian Coherent Structures in three-dimensional flows
... large coherent vortices, and by the process of filamentation by which strain regions in the boundaries of the vortices produce lines of vorticity that are continuously stretched and deformed by the flow, ...
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Magnetic field generation by coherent turbulence structures
... the coherent turbulent structures are capable of magnetic field ...field structures and spectra, as well as strain–field interactions, refers to the case Pr m = ...
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